ABSTRACT
The method of image generation introduced in the second and third chapters can also be successfully employed to produce computer animated motion pictures. As is well-known, a traditional motion picture consists of a series of still pictures, called frames, projected on a screen in rapid succession. The objects in the frames are shown in successive positions slightly changed, so as to produce the optical effect of a continuous picture in which the objects move. Nowadays, motion pictures can be conveniently recorded on videotapes for playing through a television set. Such recordings are commonly referred to as videos. In the United States, frames are shown on television at a rate of 30 per second. At that speed, if the frames vary smoothly, the human eye is incapable of seeing the individual still pictures and perceives motion.
